A thermally active delayed fluorescence organic compound with 2-cyanopyrazine as acceptor and its preparation and application

A technology of organic compounds and delayed fluorescence, which is applied in the fields of organic chemistry, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., and can solve problems such as spectrum being affected by solvent polarity, large excited state dipole moment, and device stability degradation , to achieve good industrial application prospects, good photoelectric performance, and reduce the effect of impact
CN110256409BActive Publication Date: 2021-01-15ZHEJIANG HONGWU TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG HONGWU TECH CO LTD
Publication Date
2021-01-15

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Abstract

The invention discloses a thermally active delayed fluorescence organic compound with 2-cyanopyrazine as an acceptor and its preparation and application. The structure of the thermally active delayed fluorescent organic compound is shown in the general formula (1). The compound is based on the light emitting mechanism of TADF and is used as a light emitting layer material in an organic electroluminescent device. The device produced by the invention has good photoelectric performance and can meet the requirements of panel manufacturers.
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Description

technical field

[0001] The invention relates to the field of semiconductor technology, in particular to a thermally active delayed fluorescence compound with a small excited state dipole moment using 2-cyanopyrazine as an acceptor and its use as a light-emitting layer guest material in an organic electroluminescent device on the application. Background technique

[0002] The application of organic light-emitting diodes (OLEDs) in large-area flat-panel displays and lighting has attracted extensive attention from both industry and academia. However, traditional organic fluorescent materials can only use 25% of the singlet excitons formed by electrical excitation to emit light, and the internal quantum efficiency of the device is low (up to 25%). The external quantum efficiency is generally lower than 5%, and there is still a big gap with the efficiency of phosphorescent devices. Although phosphorescent materials enhance intersystem crossing due to the strong spin-orbit coupl...

Claims

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